// -*-Mode: C++;-*- // technically C99

// * BeginRiceCopyright *****************************************************
//
// $HeadURL$
// $Id$
//
// --------------------------------------------------------------------------
// Part of HPCToolkit (hpctoolkit.org)
//
// Information about sources of support for research and development of
// HPCToolkit is at 'hpctoolkit.org' and in 'README.Acknowledgments'.
// --------------------------------------------------------------------------
//
// Copyright ((c)) 2002-2019, Rice University
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the
//   documentation and/or other materials provided with the distribution.
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// * Neither the name of Rice University (RICE) nor the names of its
//   contributors may be used to endorse or promote products derived from
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// ******************************************************* EndRiceCopyright *

/*************************** System Include Files ***************************/

#include <stdio.h>  // for FILENAME_MAX

#define __USE_XOPEN_EXTENDED // realpath()
#include <stdlib.h>

/**************************** User Include Files ****************************/

#include "realpath.h"

/**************************** Forward Declarations **************************/

/****************************************************************************/

/*
 * 'realpath' is a UNIX standard, but it is not standard in ANSI/ISO C++. 
 * This is a C wrapper for the standard routine so that it can be available
 * for C++ programs.
 *
 */
const char*
RealPath(const char* nm)
{
  static __thread char _RealPathBuf[FILENAME_MAX]; // PATH_MAX

  if (realpath(nm, _RealPathBuf) == NULL) {
    return nm; /* error; return orig string */
  }
  else {
    return _RealPathBuf; /* resolved name has been copied here */
  }
}
